A man has his ticket checked with the help of a staff member at Kaihuasijie Station of Taiyuan Subway Line 2 in Taiyuan, capital city of north China's Shanxi Province, Dec. 26, 2020. The first phase of Taiyuan Subway Line 2, with a total length of 23.647 km and 23 stations, was officially put into operation on Saturday. It is the first subway in Shanxi. (Xinhua/Yang Chenguang)
